Intel i486

This page will show all objects that classify as Intel i486, and if possible sorted on production date.


Click on the blue name(s) below for detailed information, pictures and benchmarks (if available).

View processor details Intel i486 SX20 'SX406'
Intel i486 SX20 'SX406'

20MHz; one of the slowest 486 chips available (there are 16MHz parts as well). Thankfully it didn't sell well because it is quite a lot slower than the SX25. It's only a difference of 5MHz but remember that the front-side-bus (FSB) is also 5MHz slower. This will cause the impact to be bigger.... > Read more

View processor details Intel i486 SX25 'SX411'
Intel i486 SX25 'SX411'

Same as this SX 25 but with a different sSpec number and that it's more than two years older.... > Read more

View processor details Intel i486 DX33 'SX419'
Intel i486 DX33 'SX419'

Exactly the same as the SX33 except for the integrated co-processor. This co-processor is used for floating point calculations. At the time normal applications didn't use the FPU (floating point unit) so people had enough power with only the, much cheaper, SX 33MHz processor. After all Doom ran just... > Read more

View processor details Intel i486 DX50 'SX546'
Intel i486 DX50 'SX546'

A 1992 486DX-50; a good performer back in '92 but with high FSB which could be troublesome. The DX2/50 which runs at 25MHz FSB (clock-doubled) won't give you trouble but due the slower bus speed it will be slower with games or I/O.... > Read more

View processor details Intel i486 DX50 'SX710'
Intel i486 DX50 'SX710'

Both the Am486DX40 and Cx486DX40 were tricky on early motherboards because of their high bus speed. Think again and look at this 50MHz part that requires a 50MHz front side bus. 50MHz sounds like it will fly but unfortunately it doesn't.

My UMC PCI motherboard automatically sets the PCI bus on 25... > Read more

View processor details Intel i486 DX2/50 'SX641'
Intel i486 DX2/50 'SX641'

The same as the 80486SX2/50 but with floating point unit (FPU) on-board. The FPU is used for floating point calculations and comes in to play with CAD and Excel. Back then games didn't really use it yet so Doom will run pretty much the same on a SX2. Quake do... > Read more

View processor details Intel i486 DX2/66 'SX731'
Intel i486 DX2/66 'SX731'

A popular processor in the 486 era. The DX2/66 was able to run lots of games and applications quite well. Doom runs a lot smoother on a system with a DX2/66 fitted instead of a DX33.

This 486DX2/66 is less common because it has a nice blue heatsink attached. Most DX2/66 CPU's didn't had a heatsi... > Read more

View processor details Intel i486 SX25 'SX798'
Intel i486 SX25 'SX798'

A 25MHz 80486 SX processor. Not very fast but it's not the slowest 486 ever made. This one runs 5MHz faster which is noticeably in applications. The SX25 could be overclocked to 33MHz quite often without any hassle. 8MHz may not sound much but will greatly improve the speed of the system. Especially... > Read more

View processor details Intel i486 SX2/50 'SX845'
Intel i486 SX2/50 'SX845'

An unusual processor. Most people either bought the SX33, DX33 or went for the DX2/66MHz. The DX2/66MHz usually gave the extra oomph compared to the 50MHz part and was worth the extra cash.

The SX2 doesn't have an integrated floating point unit (FPU) like any other 486SX CPU. Besides that it is e... > Read more

View processor details Intel i486 DX2/50 'SX825'
Intel i486 DX2/50 'SX825'

i486DX2/50 CPU in QFP package mounted on a Compaq CPU board for Compaq notebooks from 1994.... > Read more

View processor details Intel i486 SX33 'SX902'
Intel i486 SX33 'SX902'

The SX33 was quite a good processor for a while. Both AMD and Cyrix made 33MHz parts as well but DX/2, DX/4 and even DX/5 parts from these companies can be found more easily. This is because AMD and Cyrix had to make their own 486 because Intel didn't gave the 'howto make a 486-manual' to AMD and Cy... > Read more

View processor details Intel i486 DX2/50 'SX808'
Intel i486 DX2/50 'SX808'

Made in week 28 of 1994 which makes it a somewhat late 486 DX2/50. In that time-frame the Pentium 90 was Intel's flagship and running a DX/2 66MHz, DX/2 80 or even DX/4 100MHz made more sense in 1994. However, these 50MHz parts usually run fine at 66MHz and this particular example even booted up at ... > Read more

View processor details Intel i486 DX2/66 'SX807'
Intel i486 DX2/66 'SX807'

This is not the first 66MHz CPU in my database. In fact it's the third Intel 486DX2/66. The other two have a different sSpec number and one of them is faster than usual because it has write-back cache.... > Read more

View processor details Intel i486 DX4/100 'SX900'
Intel i486 DX4/100 'SX900'

The first 100MHz ticking part Intel brought onto the x86 market. The DX4/100 was actually a DX3/100 as it didn't clock quadruple but clock triple the front side bus frequency.

In many cases an old 486 couldn't be upgraded to the DX4/100. Not only because some motherboards didn't understand the cl... > Read more

View processor details Intel i486 DX2/66 'SX955'
Intel i486 DX2/66 'SX955'

Unlike this 486DX2/66 it has no build on heatsink. This allowed people to stick their own heatsink/fan solution onto it as the 486DX2/66 didn't run happy without heatsink.

This version of the DX2/66 is the fastest Intel ever made. See the benchmarks where ... > Read more

View processor details Intel i486 SX25 'SX673'
Intel i486 SX25 'SX673'

A KU80486SX-25 (in QFP package) fitted on an UMC 4SLUD motherboard from 1992. ... > Read more